CVE-2026-115574: zulip · Missing Authorization
Affects zulipSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 12.2 when convenient.
Data as of 4 Nov 2026, 19:43 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 5.3 |
|---|
- Patch
- Available – fixed in 12.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
Upgrade zulip and zulip/zulip to 12.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| zulipzulip | Affected
| Fixed in
|
GitHubzulip/zulippkg:github/zulip/zulipOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Zulip to version 12.2 or later, where this missing authorization check has been fixed. No other mitigations are indicated by the vendor advisory.
Description
Zulip versions from 11.0 up to but not including 12.2 had a missing authorization check in the GET /json/users endpoint when web-public channels were enabled. This flaw allowed unauthenticated users to access every user's custom profile field values by using the include_custom_profile_fields=true parameter. The issue was resolved in version 12.2.
References
- github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8 (opens in a new tab)
- github.com/zulip/zulip/pull/39913 (opens in a new tab)
- github.com/zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15 (opens in a new tab)
- github.com/zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c (opens in a new tab)
- github.com/zulip/zulip/releases/tag/12.2 (opens in a new tab)
- zulip.readthedocs.io/en/latest/overview/changelog.html (opens in a new tab)